2018 Annual heat emission from EnergyPlus simulation finer grid
Yujie Xu
2022-09-02
- Annual Total Heat Emission
- Summary Stats
- Spatial distribution
- Building type composition of grids with high (top 10%) heat emission
- Spatial distribution of heat emissions from different components in buildings
- Spatial distribution of building surface heat emissions
- Building type composition of grids with high (top 10%) building surface heat emission
- Spatial distribution of building HVAC rejection heat emissions
- Building type composition of grids with high (top 10%) HVAC rejection heat emission
- Monthly Profile
Annual Total Heat Emission
Summary Stats
| variable | min | Q1 | mean | median | Q3 | max |
|---|---|---|---|---|---|---|
| emission.exfiltration | 0.001 | 0.015 | 0.252 | 0.029 | 0.086 | 135.890 |
| emission.exhaust | -0.011 | 0.007 | 0.029 | 0.013 | 0.027 | 1.810 |
| emission.ref | -0.196 | 0.000 | 0.114 | 0.000 | 0.032 | 75.480 |
| emission.rej | 0.000 | 0.017 | 0.237 | 0.033 | 0.120 | 29.413 |
| emission.surf | 0.011 | 0.248 | 1.050 | 0.479 | 1.063 | 48.644 |
Spatial distribution
For reference, the annual average solar radiation is 259.4 W/m2.
The following figure plots the average heat emission in W/m2. It’s computed by summing the total heat emission in each grid then dividing by the number of hours in a year and the grid size in m2. The legends reflects the 10th to 90th percentile of the heat emission.
The following plots shows the top 10 percent of the grids. The legend shows the 91th to the 99th percentile.
Building type composition of grids with high (top 10%) heat emission
The following table shows the building type composition for grid cells within the top 10% annual heat emission.
| usetype | building.area.m2 |
|---|---|
| industrial | 40237952 |
| residential | 24821047 |
| commercial | 18703259 |
| institutional | 4007817 |
| building.type | building.area.m2 |
|---|---|
| warehouse | 23679808.9 |
| multi-family | 18106595.0 |
| light manufacturing | 12044125.2 |
| large office | 11947882.5 |
| single-family | 6420771.1 |
| heavy manufacturing | 4514018.2 |
| small office | 2311904.9 |
| large hotel | 2082915.6 |
| hospital | 1799185.3 |
| medium office | 1192840.6 |
| nursing home | 707781.0 |
| religious | 701590.6 |
| small hotel | 654493.1 |
| supermarket | 513222.7 |
| secondary school | 413736.2 |
| primary school | 385524.0 |
| midrise apartment | 293680.8 |
Spatial distribution of heat emissions from different components in buildings
The following figure shows the spatial distribution of total heat emissions for the five components.
Spatial distribution of building surface heat emissions
The following plots the heat emission from building surface. The legends reflects the 10th to 90th percentile.
The following zooms in to the high-emission grids with surface heat emission above the 90th percentile. The legends reflects the 91th to 99th percentile.
Building type composition of grids with high (top 10%) building surface heat emission
The following table shows the building type composition of grid cells with the top 10% building surface heat emission.
| usetype | building.area.m2 |
|---|---|
| industrial | 42358547 |
| residential | 25984236 |
| commercial | 14491966 |
| institutional | 3512849 |
| building.type | building.area.m2 |
|---|---|
| warehouse | 26354510.2 |
| multi-family | 19167436.2 |
| light manufacturing | 11723924.5 |
| large office | 8881132.2 |
| single-family | 6530602.2 |
| heavy manufacturing | 4280112.0 |
| small office | 2154340.1 |
| large hotel | 1594792.5 |
| hospital | 1547624.1 |
| medium office | 972495.8 |
| religious | 686210.6 |
| small hotel | 600435.9 |
| nursing home | 577453.7 |
| secondary school | 356805.4 |
| primary school | 344755.0 |
| supermarket | 288769.3 |
| midrise apartment | 286197.7 |
Spatial distribution of building HVAC rejection heat emissions
The following plots the heat emission from building HVAC rejection. The legends reflects the 10th to 90th percentile.
The following zooms in to the high-emission group with HVAC rejection heat emission above the 90th percentile. The legends reflects the 91th to 99th percentile.
Building type composition of grids with high (top 10%) HVAC rejection heat emission
The following table shows the building type composition of grid cells with the top 10% building surface heat emission.
| usetype | building.area.m2 |
|---|---|
| residential | 32205667 |
| commercial | 21306090 |
| industrial | 20602474 |
| institutional | 5485629 |
| building.type | building.area.m2 |
|---|---|
| multi-family | 21869365.7 |
| large office | 13050241.6 |
| single-family | 9997589.2 |
| warehouse | 9297583.4 |
| light manufacturing | 7293792.1 |
| heavy manufacturing | 4011098.8 |
| small office | 2713753.0 |
| hospital | 2342690.0 |
| large hotel | 2264517.0 |
| medium office | 1478432.1 |
| nursing home | 1209954.5 |
| small hotel | 976372.8 |
| religious | 856917.2 |
| supermarket | 822773.9 |
| secondary school | 546705.0 |
| primary school | 529362.5 |
| midrise apartment | 338712.6 |
Monthly Profile
Monthly heat emission averaged across grid cells
Monthly heat emission by different components averaged across grid cells
The average heat emission from building surfaces remain the largest across most months of the year except for January and December. Surface heat emission peaks in May, while HVAC rejection heat emission peaks in July. Heat emission from exfiltration do not exhibit much seasonality and remain pretty steady across all months while there are some dips in the summer months for the average zong exhaust air heat loss and the HVAC relief air heat loss.
Spatial distribution of heat emissions in a winter month and a summer month
The following plot shows the January and July total heat emission
The following plot shows the January and July total heat emission for different components
July heat emission
Total
The following figure shows the building heat emission in July. The legends reflects the 10th to the 90th percentile.
